Remotely-controlled selective system



Feb. 3, 1925.

T. H. PHILLIPS, JR.

REMOTELY CONTROLLED SELECTIVE SYSTEM filed? 17,1917 "n, l

5 Sheets-Sheet l a 55mm/TOR vf BY Feb, 3, 1925.

T. H. PHILLIPS, JR A REMOTELY CONTROLLED SELECTIVE SYSTEM Filed Oct. 17, 1917 3 Sheets-Sheet 2 Feb, 3, 1925. 1,525,431

1H. PHxLLlPS. JR

REMOTELY CONTROLLED SELECTIVE SYSTEM Filed oct. 1w, 1917 s shams-sheet 5 m /NVENTR [i: WDM/Q5 HFH/LL/PiJR.

Patented F eb.3, 1925.

UNITED STAT-ES,

PATENT- OFFICE.

THOMAS HENLEY PHILLIPS, JR., OFBROOKLYN, NEW. YORK, ASSIGNOR TO ELMER A.

SPER-RY, OF BFOOKLYN, NEW YORK.

REMOTELY-CONTRQLLED SELECTIVE SYSTEM.

Appiication mea october 17, 1917. serial No. 196,991.

To all whom t may concern.'

Be it known that I, THOMAS H. PHILLIPS, i Jr., a citizen of the United Statesiof America, residing at 3 Essex Street, Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Remotely-Controlled Selective Systems, of which the following is a specification.

This invention relates to the selective con-y trol of translating devices from a distance by means of a minimum number of line wires or by radiant energy. More specifi- -cally the invention relates to such a system9 yin which the selection is accomplished by the duration or length of a sustained impulse or interruption of a sustained' impulse.

One of the principal objects of this invention is to provide a system as outlined above which is simple and reliable in operation.

v Another Objectis to provide means for adjusting or synchronizing the instruments at the' sending and receiving stations, preferably, from the sending station. Another object is to provide sending means for automatically timing the duration of the impulse, or interruption of the impulse, fron1 the sending station. i

Another' object is to provide means operable from the sending station for locking the mechanism at the receiving station against interference.

. A- further object is to back signalling system.

Other objects and advantages will appea as the invention is hereinafter develo e r pReferring to the drawings which illusprovide an answer .trate what I not7 consider the preferredv forms of my invention:

Fig. 1 is an -inverted plan view, with the casing removed, of 'one form of sending mechanism. f

Figu2 is a sect-ionen the line 2-2 of Fig. l

Fig. 3 is a top planv view of the structure shown in Figs. 1 and 2. .v 'Figs 4 and 5 are fragmentary details of certain of the parts shown in Figs. 1 and 3. Fig. 6 is a plan view of one form/of my receiving and selective means. A

Fig. 7 is'an end elevation of the apparatus shown in Fig. 6 with the end plate removed.

Fig. 8 is an end elevation of the mechanism shown in Fig. 6, the parts shownin Fig. 7 being omitted. l

Fig. 9 isa fragmentary detail elevation of a part ofn the mechanism shown in Fig. 7 with the members 69, 82 and 64 removed.

Flgs. 10 and 11 are wiring diagrams of a preferred form of the invention, illustrating the connections at the or controlling statjon, and Fig. 11 at the receiving or' controlled station.

Fig. 12 is a wiring diagram of a modified form of transmission means and Fig. 13 is a fragmentary,- partly diagrammatic, detail elevation of a modified form of selective means.

My invention, as herein disclosed, comprises sending means, transmitting means, receiving means, selective means for controlling a plurality of translating devices and answer back signals. These devices will be each taken up in detail hereinafter. y

The sending means may assume the form of a manually o erable circuit controller, or an automatica y operable one or both. I prefertoprovide both. The automatic controller may assume various forms, one form only being illustrated iny Figs. 1 to 5. v The latter is shown as comprising a shaft 1 suitably journaled for rotation in :l cover plate 2 and another plate 3 fixed thereto' but spaced therefrom by means of posts 4. For rotating said shaft 1 suitable power means, such as an electric'motor 5, is connected thereto and may be mounted on the plate 2. The connections may assume the form of a pinion 6, on the motor shaft, meshingwith an idle gear 7, which meshes with a pinion .8 on a shaft 9 carrying a Worm 10. The latter meshes with 'a `wor1n sending wheel 11 on the shaft 1.

The shaft l'mayv be provided adjacent'one end with a disk 13 secured thereto by means of a pin 14a passing through said shaft and through the hub of said disk. A disk 14: of

A insulation may be rotatably mounted on said disk 13 and frietinally held thereagainst by means of a plurality of sprin 15 loosely and adjustably mounted on the lhswer end of shaft 1 by suitable means, such as nuts 16.

Fig. 10

I The disk 14 carries, on one surface thereof,

1- a pivoted switch arm 17 biased in the direction of the arrow (see Fig. 1) a spring 38.

This switch arm 17 is adapted to engage one or the other of lugs 18, 19 located ondiskj14 on opposite sides of said arm. g 1

Means are provided for normally locking said disk 14 and its switch arm against rotation. This means may assume the 'form of a plurality of manually operable plungers or keys 20 slidably mounted in plates 2 and 3 and preferably equidistantly spaced on a` circle with its center at the axis of shaft 1.

f Each key is preferably provided with a compression spring 21 spaced between a collar 22 on Vthe key and the plate 3 and tending to urge the key to upward position. The arm 17 is of such lengthas .to engage the lower end of any one of the keys 20 which happens to be in depressed position.

Means areprovided whereby each of the keys when depressed is locked in depressed position and any previously actuated key 1s released on actuation of any other key. This means may assume the form of a. disk 23 provided with asmany radial shoulder p0rtions as there are keys 20 and loosely mount-v ed on the shaft 1. The disk 23 is given a bias in the direction of the arrow in Fig. l by means ofaY spring 25 surrounding the A shaft 1 and secured at its opposite ends to the platey 3 and disk 23. Each key is provided with an undercutportion forming'a shoulder 26 and with two op-positely extending conically shaped portions 27 and 28'as ...clearly shown in Fig. 2".

Slip ringsl 29, 30 provided on the periphery of disk 33 secured to one of the posts 4, may be em- VEach ploved to lead current yto the switch arm 17 and one or the other of contacts 18 or` 19..v

The end of the shaft l'opposite disk 14 may be provided with adisk 34 on which may be placed a pointer v35 adapted 'to cooperate with a pointer 36 onl plate 2 to enable the operator to determine the speed of shaft 1. of the keys 20 is preferably provided at itsupper end with an indicating ,symbol O, U, R, L, D, S, (see Fig. 3) and may also eachbe provided with a symbol 37 painted or' otherwise mounted on cover plate 2.

v I prefer to 'drive the shaft 1 at a substan-l tially constant speed* and to accomplish this *function a speed responsive controller may 4 be employed. Thisv controller may assume the form of a vgovernor 40 theiiy Weights 42 of which are connected to the motor sha-ft 41 andlcto a sleeve -43 slidably mounted on said sha secured yto a block of insulation 46 in turn` secured to cover plate 2.

The electricalconnections of the above deby means ofl -mally 14, together with brushes 31, 32 mounted on a block of insulating material- Thesleeve 43 carries a 4contact 44 adapted to engage a contact 45 adjustably scribed automatic circuit controller will be vdescribed hereinafter. i

As I also provide a manual troller. Any suitable form of circuit closer might be employed for this purpose. As shownv in Fig. 4 I have provided a circuit closer comprising a key 47 slidably mounted in cover plate 2 and block 46 and adapted to move a spring contact 48 against itsspring previously stated y operable con- .action into engagement with a contact 491 The key 47v is preferably also provided with an indicating symbol, such as I, on its head 'y and with indicia 37 similar to ,those of keys 20.

In addition to the above described controllers I prefer to provide also a manually w operable circuit breaker which may assume the formyillustrated in Fig. 5. Akey 50, similar to key 47 and provided with an indicating symbol K, is adapted to break northe ey against the action of its spring Alight or plate2 and visible through a glass covered opening in the 'latter completes the structure of the sending means'.

closed contacts 51,252 by depressingk other signal 54 v"mounted on cover y The electrical connections and operationv of the sending means may be understood by reference to Figs. 1, 3 and 10. I prefer tol use the automatic sending' switch asa norployed. series with meansof conductors and '101' and the switch I isshunted across these conductors. The motor 5 is-shown as shunt 'connected to a battery or other source 102. I prefer to have this motorrunning constantly. at a confv stant predetermined speed and vfor this pur-l pose I have shown a resistance 103 inl series with the armature of the motor and connected at its terminals to the governor contacts 44, 45. y

It will be seen that the circuit between as=indicated in Fig. 1,'with the key O Now let us suppose that the rIhe key O is released, the disk .14 is rotated in the direction of the arrows in Figs. 1 and 10 and after a slight interval of time the open one so that the contact 1 9 lis emy .The switch 17, 19 is connected in y they normally closed switch K by arm 17 contacts with lug19. Contacts 17, J

19 remain closed until the outer end of arm 17 engages the lower end of key U when the conta/ct is disengaged from contact 19 and engaged with lug 18 thus opening the circuit '--betweenconductors 100 and'101 and stopping rotation of disk 14. Thus by the above operation the circuit. 100, 101 is closed for slightly less than one-sixth of a. second. If

slightly less than two-sixths of a second etc.

key R had been depressed instead of key- U 5 the circuit would have been closed for The circuit may also be closed between conductors 100. 101 by operating key I and keys through a relay 104 connected in series with battery 102, across said conductors. The indicating light 54 may be connected in shunt with relay 104 and will then indicate when Vthe sending-y means is operated.

While my invention is not restricted to use in connection with radio transmitting 'means I prefer at this time to employ the latter. The specific details of the wireless system employed form no part of the present invention, and for this reason I have select/ed for the purpose of illustration, a conventional set well recognized in the art. The wireless transmission is shown as comprising a sending set 56 and a receiving or detecting set 57 (see Figs. l0 and 11).

That part of the system which I term the receiving means may consist of any form of translating device adapted to cause movement of a mechanical element on electrical energization or deenergization. Thus electromagnets 58 may be employed. (See Figs. 6, 7 and 10.)

The selective means' preferred by me at this time comprises a switch arm (or arms) controlled by the receiving means and auf tomatically positioned with respect to a :plu-

rality of contacts in accordance-with the' imlse received by the receiving'means.

e specific embodiment of such selective means is shown in Figs. 6, 7 8, 9 and 11.. The switch arm is shown in the form of a resilient arm 60 mounted on the outer end of a shaft 63 suitably'journaled in plates 62, 65. The last mentioned lates, of which the one 62 is preferably ma e of insulating material are mounted in juxtaposition with respect to each other but in spaced relation with respect to a plate 67 by means of posts 66. The plate 67 may 'be secured to the frame of the electric motor or other power means 68 which may be in all respects similar to motor '5. 'The shaft 63 has secured thereto at its inner end a ratchet disk 64, said shaft terminatingl with said disk. The last mentioned disk maybe frictionallv `driven by a gear wheel 69 secured to a shaft 70 journaled in plate 67.v The shafts 63 and 70 although in alignment are not connected to each other except through. the gear 69, disk 64 and a friction disk 82 mounted between the latter. A spring 71, adjustably connected at'the outer ends of two of the Iposts 66 and engaging at its central portion, the shaft 63, may be employed to adjust` the frictional torque between the gear 69 and disk 64.- Suitable gearing, such as transmission a train of gears, 73, 72, 74, 75, is employed to drive the gear 69 from the shaft of motor 68 and for the purpose of maintaining the speed of the motor 68 substantially constant a governor 76 similar to the governor 40 may be employed. The governor shaft may be rotatably mounted in a bracket 77 secured to the frame of motor 68 and a pinion 78 mounted on the governor shaft and meshing with gear 72 may be employed to drive the governor. An adjustable contact 79 mounted on but insulated from bracket 7 7 and cooperating with the end 80 of the governor shaft, may be employed to control the motor connections. f

In order to control the position of ratchet' disk 64, and consequently arm 60, from the receiving means 58, a centrall pivoted pawl lever 8l may 'be employed. referably this lever is made T-shaped comprising arms 83, 84, 85, rigidly connected to each other and pivoted at their junction to the plates 67 and 65. The electromagnets 58 are adapted to operate the armr83 in one direction and a spring in the other. Thus a spring 86 (Fig. 6) may 'be employed to bias the arm in a ratchet engaging position and the arm 84 provided with an armature 87 adapted to be attracted by the magnets 58 mounted belo7 said armature by means of a bracket 88 secured to two of posts 66.

In order to lock the arm 60 against operation by interference I provide means controlled by electromagnets 58 for locking the disk 64 against operation preferably when an impulse of more than a predetermined length is impressed on said electromagnets.

One form of suchi means is yclearly illus-- gear 89 adapted to mesh with teeth provided on shaft 63 when the magnets 58 are energized, and pivotally connected to the free end of arm to an extent allowing the arm 83 to move out of the path of the ratchet teeth but not sufhcient to allow a lug 90 on arm 85 to move into the path of a stop pin 91 mounted on ratchet disk 64. However, if rotation of diskv64 and shaft 63 is permitted for a sufficient length of time the segment 89y will be moved downwardly until it passes'under shaft 63, when arm 85 will.. be permitted to move: the lug 90 into the path of pin 91. A spring 92 connected at one end to arm 85 and at the other to segment 89 may be employed to return the latter to'upper position, which movement may be limited by a stop 93 mounted on the plate 65.

be mounted on plate 62 in a position to be engaged by arm 60 in its various positions for the purpose of controlling a plurality of translatlng devices.

A plurality of electrical contacts 61 may llt.y

lit)

' One form of electrical connections of the outer contacts.

selective means is indicated in Fig. 11. For convenience in explanation I will term the circular row of contacts 61 nearest the center, inner contacts, the intermediate circular row, middle contacts, and the'outer row, Furthermore radial rows will be designated O, U, etc., corresponding to the various positions of the sending means. The switch arm 60 is shown as con` nected to one terminal -of battery 105 through a switch 106, 107 lof which the contact 106 is fixed and contact 107 carried by armature 87. Inner contacts U, R, S, D and L are ea'ch shown as connected to a cor,- responding one of translating devices, shown as relays 108, of Which the other terminals are connected to the battery 105.

Let it be assumed that the motor 68 is connected and controlled in thesame manner as motor 5, so as to rotate the shaft 70 at the same speed as shaft 1,- i. e., one revolution per second. Then if magnets 58 are energized for a length of time slightlzy less than one-sixth of asecond the. pawl 83 will release the disk 64 and permit the arm 60 to vrotate through one-sixth of a revolution Iff the magnets 58 are energized longer than I- depress vthe key ll one-sixth of a second, but less than twosixths of a second, the arm will rotate through two-sixths of a revolution, etc. v

The circuit to the translating devices 108 cannot be closed While the arm is wiping over contacts 61 as`it is open at 106, 107 at this time.

l rlhe front contacts of relay 104 of the sending means may bel-connected through a switch 109 to the wireless sending set 56 and .the fronttcontacts of the sensitive relay 110 of the wireless receiving set 57 may he utilized to control' the receiving means 58. Thus magnets 58 are shown as connected .in series with a switch 111 battery 105, and the last mentioned front contacts.

fr With these preferred connections and the shafts 1 and 70 revolving at the same speed `and the arms 17 and 60 inthe position O suppose that 'it .is desired to select one\o the -translating devices 108. Thus supposing that it is desired to energize the translating device connected to inside contact 61 at the position U all that is necessary is to at `-the sending station.-

i ny of the-other translating devices may be selected in a similar' manner. Although I prefer to accomplish the selection by employing the automatic sending switch, it is obvious that the key I may be employed for the same purpose if carefully operated with reference to time. v

If the'switch arm 60'is at position O and it is desired to lock the selector against inl terference, it is only necessary -to press key I lfor a` time greater than vev-sixths of a second (under the conditions of speed assignalling means.

y vLezama sumed) which lwill cause` the sector 89 to U and the interference key at the sending station is depressed and held depressed the arm 60 will rotate almost a. complete revolution, i. e. it `will be between positions O and U'when the sector 89 passes under the pinion 63.' The lug 90 will now be in the path of the pin 91 but as the latter has already passed the position of this lng the switch arm Will not be locked until the said pin 91 travels around toa position to engage.

the lug 90. This engagement will take place when the arm 60 reaches the position at I.

Obviously if an Jinterfering group of impulses is sent out by some one other than the operator at the sending station the magnets 58 willcause the arm 60 ,to be locked at I as atleast one of these impulses will be longer than those I contemplate using in my apparatus.

In order to inform the operator at the 4 sending station Whether or not the'selector switch at the receiving station is responding properly and also to inform himat any time of the condition of the apparatus at the receiving station I provide answer -back While this means may assume various forms I prefer to use a pair of lamps 120, 121 controlled by a flasher and.

certain of contacts 61.

One suitable forni of flasher is shown in l Figs. 6, 7, 9 and 11. The shaft 70 carriesa cam 111- adapted to engage and operate movable contact arms 112 and 113 whichl are biased to a position in engagement with ,the relatively fixed contacts 115 and 114 respectively. The cam is adapted in its rotation to break'engageinent between contacts 112 and 115 and cont-acts 113 and 114 and practically simultaneously make contact between 112 and a .fixed contact 116. The contacts 112 Vto 116 are insulated from each other and from the plate 67 whichcarries them by vmeans of insulation 117 'The lamp 120 is shown' as having one terminal electrically connected to contact 113 and the followlng of the contacts 61: outer contact S, outer contact R and outer contact O. One terminal of the lamp 121 is connected to contact 112 and the following of contacts 61: outer contact L and inner contact O.

The free terminals of the lamps 120 and 121 are connected to the terminal of the battery 105 opposite the one to which the arm 60 is connected. The contact 115 is connected to outer contact D, middle contact Rand outer contact U; the contact 114 is connected to middle contact D, middle Contact L and inner contact I; and contact 116 vis connected to middle contact I. As the arm 60 is deenergized when it stops on row I of contacts 61 I provide a shunt 'connection 122 from outer contact I around switch 106, 107.

By tracing the above described circuits it will be found that when the arm 60 stops on row O of contacts 61 both lamps 120, 121

glow steadily, on row U lamp 120 is out and 121 flashing or fiickering, on row. S 120 glows steadily'and 121 is out and so on, as indicated by the corresponding indicia 37 on plate 2 (see Fig. w

If the operator depresses one of the' keys,

, say key R.y and the arm 60 at the receiving stationtakes position R an answer backv signal will be given corresponding to indicia 37 below key R, i. e., lamp 120 will glow steadily and lamp 121 will flash. If any other answer back signal is given, for eX- ample, two lights flashing together, the operator will be apprised that the sendingY and receiving mechanism are out of synchronism. Synchronism may then be restored 1n either .of two ways, i. e., by depressing keys O and I successively or by holding down key K and then depressingthe key corresponding to the answer back signal previously received. In the firstcase, both the arm 60 and arm 17 will be restoredl to position O. The operator may check up the speed of the shaft- 1 at any time by the revolution of pointer (see Fig. 3) and may adjust thespeed if necessary by adjusting the contact of governor 40.

The system as Labove described is suscepti- V blc to modification, in various ways, both y in mode of operation and in structure. 'Thus i ,to

l of being groupedfina plurality of concentric' rows may be all arranedon the arc ofthe by throwing switches 109 and 111 to dotted line position as indicated in Figs, 10 and 11, the system instead of depending on the.

duration or llength of the transmitted and recelved impulses would depend on the length of interruptionrof a' sustained impulse. Furthermore, instead of employing radio transmission means the stations may be connectedby one or more line wires.

Fig. 12 illustrates my'invention adapted for use with a single line wire 130, ,the latter connecting the relays 110 andl 104. v The line may be energized by means of a battery -or other source I131 connected to the armature ofthe relay 104. A switch,109 similar to switch 109 may be provided for a similar purine,v

' The selective means -may be 'modified in various ways. Thus the contacts 61 instead same circle as indicate in Fig. 13. In this figure the contacts are grouped as indicated at 61, 61h, and 61. Three equiangularly spaced arms 160, 260 and 360 may be substituted for the single arm and the speed of rotation of the shaft 7 0l accordingly cut down to one-third. IThe position of arms inner and middle contacts of row I of contacts 61 respectively (see Fig. 11). The contacts 134, 135 and 136 are carried by the .sor

member and fulfil not only the function of the corresponding contacts in Fig. 11, but also of the lug (see Fig. 7). The position and o eration of thesejcontacts` with respectto pin 91 is the same as lthat of lug 90 and needs no lengthy description. These contacts are adapted to engage eachother ywhen the top one is engaged by lug 91.

The selective instrument at the receiving station (Fig. 11) may be locked against interference by operating the sending keys in ways other than those previously described. Thus assuming that one of the keys 20 is depressed and it is desired to lock the receiving station against interference, one of the other keys 20 may be depressed to such an extent as to release the first mentioned key but not sufiiciently to allow the disk 23 to engage the shoulder `26 (see Fig. 2) of the last mentioned key to lock the latter in depressed position. The switch 17-18 then remains closed as there is" no key 20 depressed to open it, so that a sustained impulse is transmitted thus causing the receiving means to lock the )selective means.' Obviously the above procedure may be ado ted instead of utilizing no the keyv I when it 1s desired to synchronize as previously outlined.

Instead of effecting the release of all of the keys 20 in the manner above described, the same result may be accomplished by pushing a rod 400 (see 1 and 2) inwardly. This rod is shown as passing through an opening 403 in plate 23 and Thus the translating device 108 purposes of inspecthereof, but I desire to have it understood --that the apparatus shown is only illustrative and that theinvention can be carried out by other means. lAlso, while it is designed to use the various features and elements in the combination and. relations described, some of tliese may be altered and others omitted and some of the featuresof each modication may be embodied in the others without interfering with the more general results outlined, and the invention extends to such use.

Having described my invention, what I claim and desire to secure by Letters Patent vis:

1. In combination, sending means, receiving means, radio transmitting means .connected to said sending and receiving means, selective means controlled by said receiving means, answer back signalling means controlled by said selective means and means for preventing operation of said signaling means when said selective means is operating.

' 2.' In combination, sending means, remotely located selective' means, radio transmitting means between said. sending and selective means, means for causing said selective means to assume positions depending upon the impulses transmitted and means for positioning said sending means in accordance with said selective means without causing actuation of sa-id transmitting means.

3. In combination, a rotatable switch arm, a remotely located selector switch, means including a radio transmitting system for causin said selector switch to rotateA substantial y in synchronism with said arm and means for preventing Vrotation of said selector switch upon continuous rotation of said arm for more than a predetermined time.

4. In combination, means for sending iinpulses of different lengths, receiving means,-

selective means controlled .in' accordance with the length of impulse received by said receiving means and means responsive to a comparatively long impulse sent from said sending means for locking said selective means in a predetermined posit-ion.'

5. In combination, sending means includ- Aing a plurality of keys, receiving means,V

radio transmitting means connected to said send-ing and receivin means, selective mea-ns controlled by said receiving means,

`depending on the duration ing one of said stops to answer-back signalling means controlled by said selective means, and indicating symbols adjacent said keys, each symbol corresponding to the answer-back signal sent in response to actuation of the key adjacent that symbol.

6. Selective means comprising a rotatable member, means normally preventing rotation of said member, means-for releasing said preventing means to permit rotation of said member and means called into action by -a prolonged actuation of said releasing means for preventing rotation of said member.

7 In combination, a selective device, means controlled by the length of a received impulse for controlling said selective device and means responsive to a prolonged imulse for locking said selective device in a xed predetermined position.

8. In combination, a plurality of contacts,

means for selecting certain of said contacts of a received impulse and means responsive to a prolonged impulse for locking said selecting means in a predetermined position.

9. In combination, a plurality of translating devices, means responsive to the length of a received impulse for selectively controlling said translating devices and means responsive to a prolonged impulse for locking said selective means in a predetermined position.

10. In combination, selective means, receiving means, al movable stop and means for moving said stop into the path of said selective means on prolonged energization of said receiving means.

11. In combination, a rotatable selective switch, means for preventing rotation of said switch, means comprising an electromagnet for actuating said preventing means and means for preventing rotation of said switch on prolonged energization of said electro-magnet.

12. In combination, a normally rotating translating device, a plurality of contacts, selective means normally connected to said device for selecting certain of said contacts and receiving means for controlling said selective means in accordance with the duration of a received impulse.'

13. In combination, a selective switch, means for actuating said switch, a plurality of stops for preventing actuation of said switch andl receiving means foi` successively causing one of said stops to permit actuation of said switch and another of said stops to stop actuation of said switch, in

w response to a prolonged impulse.

14. In combination, aselective switch, a plurality of stops for preventing actuation of said switch, and means responsive to an impulse of a predetermined length for movdisengaged position by said shaft for controlling the position of another of said stops. Y

16. In. combination, a selective switch, a ratchet disk connected to'said switch, normally rotating power means frictionally connected to said disk and an electro-magnetically controlled pawl cooperating with said disk for stopping said disk in any one of a plurality of positions.

17. In combination, a selective switch, means for actuating said switch, means including a ratchet disk and a plurality of stops' for preventin actuation or said switch, electromagnetic means for actuating said stops and means for retarding the actuation of one of said stops.

1S. In a radio selective systenna receiver comprising a multipoint selective switch, a translating device for actuating said switch and means controlled jointly by said switch and translating device for giving a distinct signal for each position of said switch.

19. In a radio selective system, a receiver comprising a multi-point selective switch, power means for actuating said switch, a flasher operated by said power means and means including said flasher and certain ot the points of-said switch for giving a distinct signal for `each position of said switch.

20. In/ combination, a plurality of translating devices, a selective device for controlling said translating devices, constant speed means constantly tending to rotate said selective device, means for preventing rotation of said selective device, and means responsive to impulses of radiant energy for actuating said preventing means to permit rotation of said selective device to an extent proportional to the duration ofa received impulse. y l

21. In combination, la selective device, a substantially constant speed translating device normally tending" to actuate said selective device, and means responsive to impulses of radiant energy for causingl said translating device to actuate said selective device to a position depending on the duration of a received impulse.

22. In combination, sending means, receiving means, radio transmitting means connected to said sending and receiving means, a plurality of contacts, a selector switch controlled by said receiving means for selecting certain of said contacts de- 23. In combination, sending means, re-

motely located selective means, transmitting means between said sending and selective means, mea-ns controllable from said sending means for causing movement of said selective means in a given direction, and means controllable from said sending means for preventing further movement of said selective 'means in said direction on sustained actuation of said sending means.

24. In combination, sending means, remotely located selective means movable to various positions, transmitting means between said scnding and selective means, and mea-ns responsive to prolonged actuation of said sending means and movable into the path of said selective means for holding said selective means in a predetermined position.

25. In a system for selectively controlling objects at a distance, a sending switch, electrical power means for actuating said switch, ai; selector switch, electrical power means for actu-ating said selector switch, a plurality ofcontacts engageable by said selector switch,- means responsive to impulses controlled by said sending switch for causing said selector switch to remain in engagement with any desired one of said contacts, and means for maintaining the speeds of said power means substantially constant.

26. In a system for selectively controlling objects at a distance, a sending switch, electrical actuatiiig'means therefor. a selector switch, a plurality of contacts engageable by said selector switch, means responsive to impulses controlled by said sending switch for preventing movement of said selector switch beyond any desired one of said contacts, electrical actuating means therefor, and adjustable means for causing the speeds of said actuating means to bear a predetermined relationship. V

27. In a system for selectively controlling objects at a distance, a sending switch, an electric motor for actuating said sending switch, a selector switch, an electric motor for actuating said selector switch, a plurality of contacts engageable by said selector switch, means responsive to impulses controlled by said sending switch for maintainingthe selector switch in engagement with any desired one of said contacts, and speed responsive means for automatically mamtaining the speeds of said motors substantially constant.

28. In combination, a rotatable switch arm, a radio transmitting system, means normally tending to rotate said arm, means for restraining said larm from rotation, means sending means itorl means controlled by said selector switch to rotate substantially i for maintaining the contacts, and means in synchronism with said arm.

' 29. In' combination, sending means, Y a selector switch, means for actuating said switch, a plurality of contactslengageable by said switch, means responsive to impulses controlled by said sending means for causing said selector switch to select and remain in engagement with any desired one of said for positioning said sending ymeans in accordance with said selector switch without causing actuation of said sending means.

30. In combination, sending means, remotely located constant speed selective means, radio transmitting means between said sending and selective means, and means called into action byv a prolonged actuation,

of said sending means for locking Csaid selective means. in a predetermined position against actuation by interference.

31. In combination, sending means, a re- -motely located selector switch, means constantly tending to rotate said switch, means speedof the second mentioned means substantially constant, means for .preventing rotation of said selector switch, means controllable from said actuating said preventing means to permit rotatio n of said selector switch in a given direction, and means 32.' In combination, sending means, a' resaid switch, a plurality of contacts engageable by said switch, means re-V motely located selector switch, means for actuating sponsive to impulses controlled by said sending means for causing said yswitch to select and remain in engagement with `any desired one of said contacts, and means controllable by said sending means for synchronizing saidsending and selective means.

33. In combination, a normally rotating translating device, ineans -for maintaining the speed of rotation of said device substantially. constant, a plurality of contacts, means normally connectedto said device for selecting certain of said contacts, and receiving means for controlling said selective means in accordance with the duration of a received impulse. v

34. In combination, a rota-table switch arm, a remotely located selector switch,

`means including a radio transmitting system for causing said selector switch to rotate continuously during rotation of said arm and substantially in synchronism therewith, a plurality of' contacts engageable by Said switch, and means controllable by said arm for causing said switchto remain in engagement with any desired one of said contacts.

aiiixed my In testimony whereof I have signature. THOMAS HENLEY PHILLIPS, Jn. 

